PLASMA PHYSICS AND CONTROLLED FUSION 58 (2016) ARTN 045018
Nature Communications 7 (2016)
© 2016, Nature Publishing Group. All rights reserved.Twisted Laguerre-Gaussian lasers, with orbital angular momentum and characterized by doughnut-shaped intensity profiles, provide a transformative set of tools and research directions in a growing range of fields and applications, from super-resolution microcopy and ultra-fast optical communications to quantum computing and astrophysics. The impact of twisted light is widening as recent numerical calculations provided solutions to long-standing challenges in plasma-based acceleration by allowing for high-gradient positron acceleration. The production of ultra-high-intensity twisted laser pulses could then also have a broad influence on relativistic laser-matter interactions. Here we show theoretically and with ab initio three-dimensional particle-in-cell simulations that stimulated Raman backscattering can generate and amplify twisted lasers to petawatt intensities in plasmas. This work may open new research directions in nonlinear optics and high-energy-density science, compact plasma-based accelerators and light sources.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (2015)
© 2016 The Authors.The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) aims at studying plasma wakefield generation and electron acceleration driven by proton bunches. It is a proof-of-principle R&D experiment at CERN and the world's first proton driven plasma wakefield acceleration experiment. The AWAKE experiment will be installed in the former CNGS facility and uses the 400. GeV/c proton beam bunches from the SPS. The first experiments will focus on the self-modulation instability of the long (rms ~12. cm) proton bunch in the plasma. These experiments are planned for the end of 2016. Later, in 2017/2018, low energy (~15. MeV) electrons will be externally injected into the sample wakefields and be accelerated beyond 1. GeV. The main goals of the experiment will be summarized. A summary of the AWAKE design and construction status will be presented.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 113 (2016) 3950-3953
Investigation of the solid-liquid phase transition of carbon at 150 GPa with spectrally resolved X-ray scattering
HIGH ENERGY DENSITY PHYSICS 14 (2015) 38-43
Evidence of locally enhanced target heating due to instabilities of counter-streaming fast electron beams
PHYSICS OF PLASMAS 22 (2015) ARTN 020701
PLASMA PHYSICS AND CONTROLLED FUSION 57 (2015) ARTN 125006
ASTROPHYSICAL JOURNAL 807 (2015) ARTN 46
JOURNAL OF PLASMA PHYSICS 81 (2015) ARTN 325810501
Development of a general analysis and unfolding scheme and its application to measure the energy spectrum of atmospheric neutrinos with IceCube: IceCube Collaboration.
The European physical journal. C, Particles and fields 75 (2015) 116-
We present the development and application of a generic analysis scheme for the measurement of neutrino spectra with the IceCube detector. This scheme is based on regularized unfolding, preceded by an event selection which uses a Minimum Redundancy Maximum Relevance algorithm to select the relevant variables and a random forest for the classification of events. The analysis has been developed using IceCube data from the 59-string configuration of the detector. 27,771 neutrino candidates were detected in 346 days of livetime. A rejection of 99.9999 % of the atmospheric muon background is achieved. The energy spectrum of the atmospheric neutrino flux is obtained using the TRUEE unfolding program. The unfolded spectrum of atmospheric muon neutrinos covers an energy range from 100 GeV to 1 PeV. Compared to the previous measurement using the detector in the 40-string configuration, the analysis presented here, extends the upper end of the atmospheric neutrino spectrum by more than a factor of two, reaching an energy region that has not been previously accessed by spectral measurements.
NATURE PHOTONICS 9 (2015) 274-279
Observation of magnetic field generation via the Weibel instability in interpenetrating plasma flows
NATURE PHYSICS 11 (2015) 173-176
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 449 (2015) 2421-2435
EUROPEAN PHYSICAL JOURNAL C 75 (2015) ARTN 20
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 449 (2015) 3479-3502
ASTRONOMY & ASTROPHYSICS 576 (2015) ARTN A80
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 448 (2015) 3391-3404
ASTROPARTICLE PHYSICS 66 (2015) 39-52
ASTROPHYSICAL JOURNAL 806 (2015) ARTN 117
INEFFICIENT DRIVING OF BULK TURBULENCE BY ACTIVE GALACTIC NUCLEI IN A HYDRODYNAMIC MODEL OF THE INTRACLUSTER MEDIUM
ASTROPHYSICAL JOURNAL 815 (2015) ARTN 41